These are small ships with very "primitive" showrooms compared to bigger ships. These ships focus on great itineraries, tours, good food and comfortable cabins. They do not focus on entertainment.
There will be shows and other acts, but not as much razzledazzle as a carnival or Royal caribbean show.
I am sure you will be happy with the food. For under 700 passengers you have a choice of 4 different open seating restaurants every night (some require reservations).